Rocking-chair attachment



- (No Model.)

W. I. BUNKER.

ROCKING CHAIR ATTACHMENT} No. 416,209. Patented Den. 3, 1889.

. UNITED STATES PATENT OFFICE.

\VILLIAM I. BUNKER, OF CHICAGO, ILLINOIS.

ROCKING-CHAIR ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 416,209, dated December3, 1889.

' Application filed June 28, 1887. Serial No. 242,797. (No model.)

To all whom it may concern.-

Be it known that I, \VILLIAM I. BUNKER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvem ent in Rocking-Chair Attachments, ofwhich the following is a specification.

The object of my invention is to make a simple economical springattachment for platform rockingchairs, in which the spring shall becompressed, instead of extended, by the rocking of the chair; and theinvention consists in the features and combinations hereinafterdescribed and claimed.

In the accompanying drawings, Figure l is a sectional elevation of oneof the rockers and base-rails of a platform rocking-chair, showing myimproved attachment secured to the inside thereof. Fig. 2 is across-section taken on line 00 of Fig. l, and Fig. 3 is a perspectiveview of the bracket shown in Fig. 1.

In the drawings, A is the rocker; l), the base-rail; O, theconnecting-spring; c, an extended end portion thereof; D, a stud orbracket for securing the extended end portion of the spring to therocker or base-rail; E, a slot in the end of the bracket, and c a nutforsecuring the extended end of the spring to the stud or bracket.

In constructing my improved attachment I make an open coiled spring ofsuitable dimensions and length, and preferably about two and a halfinches long and substantially the same, or a little less, in diameter,the wire at one end of the spring being bent and extended upwardly ordownwardly lengthwise of the spring and beyond its opposite end. Theentire body of the coils is preferably above or below the line ofcontact between the rocker and based-ail, with the end nearest such linesecured to the rocker or base rail by a bracket, and the extendedportion of the wire at the other end of the spring passed through thebody of the coils and attached to a bracket or stud 011 the oppositemember of the chair. I have provided the end of the stud or bracket witha slot E, extending a sufficient distance therein, and have turned upthe outer end of the stud or bracket.

The extended end of the wire 0 is preferably.

provided with screw-threads, and has a nut e screwed thereon. It isinserted into the slot in the end of the stud or bracket and the nutpassed behind the upturned end, in which position it is held by thetension of the spring.

In all of the figures of the drawings I have provided for the attachmentof one end of the coiled spring to an ordinary bracket, and haveprovided a stud or bracket in which the extended end portion 0 of thespring can be attached or detached by simplyinserting such end portionor wire in the slot adapted to receive it, and taken out by lifting theend portion out of such slot. By means of the nut shown on the extendedend portion of the wire the tension of the spring may be regulated orvaried at pleasure by screwing the same up or down.

I do not herein claim a compressible spiral spring which does not havean end portion extending lengthwise integral with its coils, a springwithout an integral extension being covered by my application of July23, 1887, Serial No. 245,071.

I have shown a nut for adjusting the tension of the spring, both in thisapplication and in my application, Serial No. 245,071, filed July 23,1887 5 but in this case the adjusting means are used in connection witha rod integral with the wire of the spring, and in the other they areused with a rod not integral with the wire of the spring, and I do notmean in either case to claim the construction shown in the other.

hat I regard as new, and desire to secure by Letters Patent, is-

1. I11 combination with the rocker and base rail of a platformi'ockingchair, a compressible connecting spiral spring having one endsecured by a bracket to one part of the chair and the end portion of thewire extending from the other end of its coils lengthwise of the coilsand secured to a stud or bracket on the other part of the chair,substantially as described.

2. I11 combination with the rocker and baserail of a platformrocking-chair, a compressible connecting spiral spring having one endsecured by a bracket to one part of the chair and the end portion of thewire extending from the other end of its coils lengthwise of the coilsand secured to a stud or bracket on the other part of the chair, andmeans for adjusting the tension of the spring, substantially asdescribed.

3. In combination with the rocker and base- 5 rail of a plat-formrocking-chair, a compressible connecting spiral spring having one endsecured by a bracket to one part of the chair; and the end portion ofthe wire extending from the other end of its coils lengthwise of thecoils and detachably secured to a stud or To bracket on the other partof thechair and maintained in position therewith by the tension of thespring, substantially as described.

WILLIAM I. BUNKER.

\Vitnesses:

EPHRAIM BANNING, GEORGE 0. 000K.

